Cryptic crossword clue
It's a mistake to stay outside the circle, run 7

The most common and most likely answer to this crossword clue is the 7 letter word BLOOPER

B
L
O
O
P
E
R

Buddy explains!

The straight part
We know that "It's a mistake" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it's a mistake = blooper.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

What does BLOOPER mean?

BLOOPER noun
  1. A blunder, an error.
  2. A fly ball that is weakly hit just over the infielders.
  3. A filmed or videotaped outtake that has recorded an amusing accident and/or mistake.
  4. A gaff-rigged fore-and-aft sail set from and aft of the aftmost mast of a square-rigged ship; a spanker.
  5. A radio which interferes with other radios, causing them to bloop (squeal loudly).

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